Toxic algae in Orange County, California
16 lakes and waterways have harmful algal bloom reports in California's official data.
Lakes with bloom history
| Lake | Years with reports | Most recent |
|---|---|---|
| San Diego Creek | 3 | 2024 |
| Huntington Harbor | 1 | 2023 |
| San Juan Creek | 2 | 2026 |
Other waterbodies with a report
These have one or two reports in a single year, so there isn't enough history for a page of their own yet.
- Beach Creek Resort Apartments Pond (2026)
- Cold Stream Canyon (2024)
- Devils Canyon Creek (2025)
- Laguna Niguel Lake (2026)
- Laguna Niguel Park Lake (2026)
- San Diego Creek Trail (2026)
- San Joaquin Freshwater Marsh (2017)
- San Mateo Canyon Creek (2025)
- Sulphur Creek (2026)
- Trabuco Creek (2020)
- Veeh Reservoir (2023)
- Victoria Pond (2019)
- West Street Basin (2025)
Source: California State Water Resources Control Board, official data. For current conditions see the California HABs Portal map.